The New Sudoku Players' Forum

[JFistere]

Stuck on my first black belt puzzle.

I figured I was getting pretty good, so I got what Barnes & Noble called their toughtest puzzle book. I didn't get very far!:)

Here is where I am:

Code: Select all

Sterling Second Degree Black Belt #1

. 1 8 | 3 9 4 | . . .
. . 4 | . 8 . | . . 3
3 9 . | 5 . . | . 4 .
------+-------+------
8 5 1 | 6 4 7 | 2 3 9
. . . | . . . | 4 . .
6 4 2 | 9 3 1 | . . .
------+-------+------
. 8 . | . . 9 | . 2 4
4 . . | . 6 . | . . .
. . . | 4 . . | 7 8 .


257   1      8    | 3     9      4     | 56    567    2567
257   67     4    | 127   8      26    | 1569  15679  3 
3     9      67   | 5     127    26    | 168   4      26781
------------------+--------------------+-------------------
8     5      1    | 6     4      7     | 2     3      9
79    37     379  | 28    25     258   | 4     16     16 
6     4      2    | 9     3      1     | 58    57     578 
------------------+--------------------+-------------------
17    8      3567 | 17    157    9     | 3156  2      4
4     237    357  | 1278  6      2358  | 3159  159    51
19    236    3569 | 4     125    235   | 7     8      561


I would appreciate some help on my next move!

Thanks,
John Fistere

[Hud]

One quickie is there's a naked double in box one (67). I'm sure there's a lot more work to be done, but that's a small step for mankind.

[JFistere]

Thanks for the tip!. It broke the log jam. Pressing on, however, by the time I found I had made a mistake somewhere else, I had seven wrong numbers filled in. On to puzzle #2...

John

[underquark]

In Box1 I get different pencilmarks:

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257      1       8
257      267     4
3        9       67


There is a subtle, but crucial, difference.

[JFistere]

Yup. My errors were in that corner.

John